What was the purpose of Earth Day？ How did it start？ These are the questions I am most frequently asked.
Actually, the idea for Earth Day evolved over a period of seven years starting in 1962. For several years, it had been troubling me that the state of our environment was simply a non-issue in the politics of the country. Finally, in November 1962, an idea occurred to me that was, I thought, a virtual cinch to put the environment into the political “limelight”（引人注目的中心） once and for all. The idea was to persuade President Kennedy to give visibility to this issue by going on a national conservation tour. I flew to Washington to discuss the proposal with Attorney General（司法部长） Robert Kennedy, who liked the idea. So did the President. The President began his five-day, eleven-state conservation tour in September 1963. For many reasons the tour did not succeed in putting the issue onto the national political agenda（议程）。However, it was the germ of the idea that ultimately flowered into Earth Day.
I continued to speak on environmental issues to a variety of audiences in some twenty-five states. All across the country, evidence of environmental degradation（退化） was appearing everywhere, and everyone noticed except the political establishment. The environmental issue simply was not to be found on the nation's political agenda. The people were concerned, but the politicians were not.
After President Kennedy's tour, I still hoped for some idea that would thrust the environment into the political mainstream. Six years would pass before the idea that became Earth Day occurred to me while on a conservation speaking tour out West in the summer of 1969. At the time, anti-Vietnam War demonstrations, called “teach-ins（研讨会）,” had spread to college campuses all across the nation. Suddenly, the idea occurred to me - why not organize a huge grassroots（草根阶层，平民） protest over what was happening to our environment？
I was satisfied that if we could tap into the environmental concerns of the general public and infuse the student anti-war energy into the environmental cause, we could generate a demonstration that would force this issue onto the political agenda. It was a big gamble（赌博）, but worth a try.
At a conference in Seattle in September 1969, I announced that in the spring of 1970 there would be a nationwide grassroots demonstration on behalf of the environment and invited everyone to participate. The wire services（通讯社） carried the story from coast to coast. The response was electric. It took off like gangbusters（侦破团伙者）。 Telegrams, letters, and telephone inquiries poured in from all across the country. The American people finally had a forum（论坛）to express its concern about what was happening to the land, rivers, lakes, and air - and they did so with spectacular exuberance（活跃的）。 For the next four months, two members of my Senate staff, Linda Billings and John Heritage, managed Earth Day affairs out of my Senate office.
Five months before Earth Day, on Sunday, November 30, 1969, The New York Times carried a lengthy article by Gladwin Hill reporting on the astonishing proliferation（增殖） of environmental events：
“Rising concern about the environmental crisis is sweeping the nation's campuses with an intensity that may be on its way to eclipsing（月蚀，使黯然失色） student discontent over the war in Vietnam…a national day of observance of environmental problems…is being planned for next spring…when a nationwide environmental 'teach-in'…coordinated from the office of Senator Gaylord Nelson is planned…。”
It was obvious that we were headed for a spectacular success on Earth Day. It was also obvious that grassroots activities had ballooned（气球般膨胀） beyond the capacity of my U.S. Senate office staff to keep up with the telephone calls, paper work, inquiries, etc. In mid-January, three months before Earth Day, John Gardner, Founder of Common Cause, provided temporary space for a Washington, D.C. headquarters. I staffed the office with college students and selected Denis Hayes as coordinator of activities.
Earth Day worked because of the spontaneous（自发的） response at the grassroots level. We had neither the time nor resources to organize 20 million demonstrators and the thousands of schools and local communities that participated. That was the remarkable thing about Earth Day. It organized itself.